|
Downloadable Order
Form
Home
TEI News Page
Controls Parts
Energy Management
ASI Controls Building Automation
ASI Telco Panel
Bard Wall-Mount and
HVAC Equipment
Bard HVAC Parts Supply
Bard Controllers
Nesbitt Equipment
Gas Detection
Environmental Monitors
| |
P70, P72, and P170 Series
Controls for High Pressure Applications
Description
The P70, P72, and P170 controls for high pressure
applications are designed primarily for high pressure cut-out control,
head-pressure control, and condenser fan cycling control on commercial
refrigeration and air conditioning applications.
Controls are available in several pressure ranges and are
compatible with most common refrigerants. They may also be used on other
non-corrosive fluid applications. Ammonia-compatible models are also
available.
Several different electrical ratings and switch
configurations are available. The P72 models provide direct control of
208-240 colt single-phase motors up to 3 hp, and 208-220 volt 3-phase motors up
to 5 horsepower.
Applications
NEMA 1 enclosures are standard on most models.
- P70C, P70D, P170C and P170D models with Single-Pole
Single-Throw (SPST) Open-high switch action are the most popular models and
are typically used for high pressure cut-out. The C models are
automatic reset. The D models have a manual reset lockout
mechanism. Some P70C, P70D, P170C and P170D models are UL Listed
as refrigeration pressure limiting controls.
- P70A and P170A models are available with SPST Open-low switch action, and are typically used for condenser
fan cycling control.
- P70 and P170 models with Single-Pole Double-Throw (SPDT),
or 4-wire, 2-circuit switch action allow users to install alarm devices or
other control circuits.
- P72 models have a Double-Pole Single-Throw (DPST)
swith with load-carrying contacts that can provide direct controls of 208-240V
single-phase motors up to 3 hp, and 208-220V 3-phase motors up to 5 hp. Refer
to "DPST Electrical Ratings (P72A, B, C, and D Models)" in the chart below.
Features
- all-steel case and cover built to provide
long-lasting, rugged protection for internal components
- "Sight-Set" calibrated pressure adjustment displays a
visible pressure scale, fully adjustable throughout the range without removing
the cover (on NEMA 1 enclosure models)
- manual reset lockout option provides "trip-free" low
pressure lockout that cannot be overridden or reset until pressure returns to
specified level.
- variety of available pressure connection styles allows
greater flexibility when mounting control and adapting pressure connections to
field application requirements.
Technical Specifications
Single Pressure Controls Switch Action, Low Event, High
Event, and Models
|
Switch and Action |
Low Event |
High Event |
Models |
|
Single-Pole Single-Throw (SPST) Open-Low |
Cut Out (Opens Line to M1) |
Cut In (Closes Line to M1) |
P70A, P70B, P170A |
|
Single-Pole Single-Throw (SPST) Open-high |
Cut In (Closes Line to M1) |
Cut Out (Opens Line to M1) |
P70C, P70D, P170C, P170D |
|
Single-Pole Double-Throw (SPDT) |
Opens 1 to 2 and closes 1 to 3 |
Closes 1 to 2 and Opens 1 to 3 |
P70E, P70F |
|
4-wire, 2-circuits, 1 N.O., 1 N.C., Open Low |
Cut Out (Opens M2 to Line and Closes M1 to Line) |
Cut In (Closes M2 to Line and Opens M1 to Line) |
P70G, P70H |
|
4-wire, 2-circuits, 1 N.O., 1 N.C., Open High |
Cut In (Closes M2 to Line and Opens M1 to Line) |
Cut Out (Opens M2 to Line and Closes M1 to Line) |
P70J, P70K, P170K |
|
Double-Pole Single-Throw (DPST) Open-low |
Cut Out (Opens M1 to Line and M2 to Line) |
Cut In (Closes M1 to Line and M2 to Line) |
P72A, P72B |
|
Double-Pole Single-Throw (DPST) Open-high |
Cut In (Closes M1 to Line and M2 to Line) |
Cut Out (Closes M1 to Line and M2 to Line) |
P72C, P72D |
SPST Electrical Ratings
P70A, B, C, and D and P170A, C, and D Models
|
|
Single-Phase Ratings |
|
|
Standard |
Hermetic Compressor |
|
|
120VAC |
208VAC |
240VAC |
208/240 VAC |
|
Motor Horsepower |
2 |
3 |
3 |
- |
|
Motor Full-Load Amps |
24 |
18.7 |
17 |
24 |
|
Motor Locked-Rotor Amps |
144 |
112.2 |
102 |
144 |
|
Non-Inductive Amps |
22 |
22 |
22 |
- |
|
Pilot Duty - 125VA at 120 to 600 VAC; 57.5 VA at 120 to
300 VDC |
SPDT Electrical Ratings 1hp Switch (P70E Models)
|
|
Standard Single-Phase Ratings |
|
|
Standard |
Hermetic Compressor |
|
|
120VAC |
208VAC |
240VAC |
277 VACa |
|
Motor Full-Load Amps |
16.0 |
9.2 |
8.0 |
7.0 |
|
Motor Locked-Rotor Amps |
96.0 |
55.2 |
48.0 |
42.0 |
|
Non-Inductive Amps |
16.0 |
9.2 |
8.0 |
- |
|
Pilot Duty |
125VA at 120 to 600 VAC |
125 VA at 24 to 600 VAC |
a. Rating for P70EC models only
SPDT Electrical Ratings 1/4 hp Switch (P70F Models)
|
|
Standard Single-Phase Ratings |
|
|
120VAC |
208VAC |
240VAC |
|
Motor Full-Load Amps |
6.0 |
3.3 |
3.0 |
|
Motor Locked-Rotor Amps |
36.0 |
19.8 |
18.0 |
|
Non-Inductive Amps |
6.0 |
6.0 |
6.0 |
|
Pilot Duty |
125VA at 24 to 240 VAC |
4-Wire, 2-circuit Electrical Ratings (P70G, H, J, and
K and P170K Models)
|
|
Standard Single-Phase Ratings |
|
|
Line-M2 (Main Contacts) |
Line-M1 (Auxiliary Contacts) |
|
|
120VAC |
208VAC |
240VAC |
277VAC |
120VAC |
208VAC |
240VAC |
277VAC |
|
Motor Full-Load Amps |
16.0 |
9.2 |
8.0 |
- |
6.0 |
3.3 |
3.0 |
- |
|
Motor Locked-Rotor Amps |
96.0 |
55.2 |
48.0 |
- |
36.0 |
19.8 |
18.0 |
- |
|
Non-Inductive Amps |
16.0 |
9.2 |
8.0 |
7.2 |
6.0 |
6.0 |
6.0 |
6.0 |
|
Pilot Duty for both sets of contacts |
125 VA at 24 to 600 VAC 57.5 VA at 120 to 300 VDC |
DPST Electrical Ratings (P72A, B, C and D Models)
|
|
Standard Ratings |
Hermetic Compressor Ratings |
|
|
120VAC, 1 |
208VAC, 1 |
240VAC, 1 |
208VAC, 3 |
220VAC, 3 |
208VAC,
1 |
240VAC,
1 |
|
Motor Horsepower |
2 |
3 |
3 |
5 |
5 |
- |
- |
|
Motor Full-Load Amps |
24 |
18.7 |
17 |
15.9 |
15 |
24 |
24 |
|
Motor Locked-Rotor Amps |
144 |
112.2 |
102 |
95.4 |
90 |
144 |
144 |
|
AC Non-Inductive Amps |
24 |
24 |
24 |
24 |
24 |
- |
- |
|
DC Non-Inductive Amps |
3 |
0.5 |
0.5 |
0.5 |
0.5 |
- |
- |
|
Pilot Duty |
125 VA at 120 to 600 VAC; 57.5 VA at 120 to 300 VDC |
Selection Chart
|
Code Number |
Switch Action |
Range psig (kPa) |
Differential psig (kPa) |
Pressure Connection |
Max Working Pressure |
|
Condenser Fan Cycling Controls
(For Non-Corrosive Refrigerants) |
|
P70AA-118C |
SPST Open Low |
100 to 400 (690 to 2758) |
Min 35(241) Max 200(1379) |
36 in. Cap with 1/4 in. Flare Nut |
475 psig
(3275 kPa) |
|
P72AA-27C |
DPST Open-low |
100 to 400 (690 to 2758) |
Min 35(241) Max 200(1379) |
36 in. Cap with 1/4 in. Flare Nut |
475 psig
(3275 kPa) |
|
P170AA-118C |
SPST Open-Low |
100 to 400 (690 to 2758) |
Min 35(241) Max 200(1379) |
1/4 in. Male Flare Connector |
475 psig
(3275 kPa) |
|
ALL-RANGE Controls (For Non-Corrosive Refrigerants) |
|
P70CA-2Ca |
SPST Open High |
50 to 500
(345 to 3448) |
Min 60 (414) Max 150 (1034) |
1/4 in. Male Flare Connector |
525 psig (3620 kPa) |
|
P70CA-3Ca |
SPST Open High |
50 to 500
(345 to 3448) |
Min 60 (414) Max 150 (1034) |
36 in. Cap with 1/4 in. Flare Nut |
525 psig (3620 kPa) |
|
P70DA-1Ca |
SPST Open High |
50 to 500
(345 to 3448) |
Manual Reset Lockout |
36 in. Cap with 1/4 in. Flare Nut |
525 psig (3620 kPa) |
|
P70KA-1C |
4-wire, 2-circuit; Line-M1 Close-High; Line-M2 Open-High |
50 to 500
(345 to 3448) |
Manual Reset Lockout |
36 in. Cap with 1/4 in. Flare Nut |
525 psig (3620 kPa) |
|
P72CA-2Ca |
DPST Open High |
50 to 500
(345 to 3448) |
Min 60 (414) Max 150 (1034) |
36 in. Cap with 1/4 in. Flare Nut |
525 psig (3620 kPa) |
|
P72DA-1Ca |
DPST Open High |
50 to 500
(345 to 3448) |
Manual Reset Lockout |
36 in. Cap with 1/4 in. Flare Nut |
525 psig (3620 kPa) |
|
P170CA-3Ca |
SPST Open High |
50 to 500
(345 to 3448) |
Min 60 (414) Max 150 (1034) |
1/4 in. Male Flare Connector |
525 psig (3620 kPa) |
|
P170DA-1C |
SPST Open High |
50 to 500
(345 to 3448) |
Manual Reset Lockout |
1/4 in. Male Flare Connector |
525 psig (3620 kPa) |
|
P170KA-1C |
4-wire, 2-circuit; Line-M1 Close-High; Line-M2 Open-High |
20 in Hg to 100
(-68 to 690) |
Manual Reset Lockout |
1/4 in. Male Flare Connector |
525 psig (3620 kPa) |
|
Models for High Pressure Non-Corrosive Refrigerantsb |
|
P70AA-2C |
SPST Open Low |
0 to 150 (0 to 1034) |
Min 10 (69) Max 70
(483) |
36 in. Cap with 1/4 in. Flare Nut |
325 psig (2241 kPa) |
|
P170AA-2C |
1/4 in. Male Flare Connector |
|
P70AA-400C |
100 to 470 (689 to 3241) |
Min 35 (241) Max 200
(1379) |
36 in. Cap with 1/4 in. Flare Nut |
690 psig (4757 kPa) |
|
P170AA-400C |
1/4 in. Male Flare Connector |
|
P70CA-400Ca |
SPST Open High |
200 to 610 (1379 to 4206) |
Min 60 (414) Max 150
(1034) |
36 in. Cap with 1/4 in. Flare Nut |
|
P170CA-400Ca |
1/4 in. Male Flare Connector |
|
P70DA-400Ca |
Manual Reset Lockout |
36 in. Cap with 1/4 in. Flare Nut |
|
P170DA-400Ca |
1/4 in. Male Flare Connector |
|
Ammonia Compatible Models |
|
P70AA-119C |
SPST Open Low |
50 to 300 (345 to 2068) |
Min 20(138) Max 120(1034) |
1/4 in. SS Female NPT |
400 psig
(2758 kPa) |
|
P70CA-5Ca |
DPST Open High |
50 to 500 (345 to 3448) |
Min 60(414) Max 150(1034) |
525 psig
(3620 kPa) |
|
P70DA-2Ca |
Manual Reset Lockout |
|
P70KA-7C |
4-wire, 2-circuit; Line-M1 Close-High; Line-M2 Open-High |
a. UL Listed as refrigeration
pressure limiting controls
b. Compatible with R410A
refrigerant.
|
